// 颜色
.colorNorma{
    color: rgb(51, 51, 51);
}
.colorGray{
    color: rgb(153, 153, 153);
}
@media screen and (min-width: 0px) and (max-width: 319px){
    .fontSmall{
        font-size: 13px;
    }
    .fontNormal{
        font-size: 15px;
    }
    .fontBig{
        font-size: 17px;
    }
}
@media screen and (min-width: 320px) and (max-width: 459px){
    .fontSmall{
        font-size: 14px;
    }
    .fontNormal{
        font-size: 16px;
    }
    .fontBig{
        font-size: 18px;
    }
}